Fresh mushrooms can add delicious, savory flavor to all sorts of dishes. Sadly, they don't keep very well in the fridge if you buy them from the grocery store. With these mushroom growing kits, you can raise your own fresh mushrooms. Then cut, clean, and cook them when you're ready to eat.

The Back to the Roots (BTTR) mushroom garden will grow two to four crops of pearl oyster mushrooms, yielding about 1 pound at a time. On the outside, it looks like a simple cardboard box, but inside you'll find everything you need for two to four 1lb crops of mushrooms. The soil inside is made of recycled coffee grounds, so you're helping BTTR recycle the grounds in exchange for delicious fresh food.

The kit also includes a mister you'll use to keep the soil moist while the mushrooms grow. Just put the kit in your window, mist it twice a day, and within a week you'll start seeing the fruits of your labor. After that, they'll double in size each day, and when you're ready you can pop them off, clean them, and enjoy.

Admittedly, the kit would have been cooler if you could use your own coffee grounds for the same purpose, or refill it with the grounds from your coffee machine to get a fresh batch. Still, this makes for a fun pet project, especially if you've never done it before. The BTTR Gourmet Garden mushroom kit will set you back $19.99.